Top Transaction Processing Startups in 2027

Founded in March 2010, Zipmark has been a FinTech startup focused on simplifying business payments through a SaaS application. Now, we're building a new platform called OpenTransact to address specific pain points for merchants. Our target customers are Merchant Acquiring Banks and Payment Facilitators all over the world - credit cards, debit cards, PayPal and Bitcoin.

The Marqeta Platform is the world’s first fully documented, open API issuer processor platform, built from the ground up with no legacy infrastructure for flexibility, scalability and performance. Marqeta has re-engineered how physical payment cards, virtual payment cards and mobile wallets should be developed and deployed.

Checkout.com is one of the most exciting and valuable fintechs in the world, with our Series D taking our valuation to $40 billion. Our mission is to enable businesses and their communities to thrive in the digital economy. We’re the strategic payments partner for some of the best known fast-moving brands globally such as Wise, Hut Group, Sony Electronics, Homebase, Henkel, Klarna and many others. Purpose-built with performance and scalability in mind, our flexible cloud-based payments platform helps global enterprises launch new products and create experiences customers love. And it's not just what we build that makes us different. It's how. We empower passionate problem-solvers to collaborate, innovate and do their best work. That’s why we’re number 9 on the Forbes Cloud 100 list and on Glassdoor’s list of Top 10 fintechs to work for. And we’re just getting started. We’re building diverse and inclusive teams around the world — because that’s how we create even better experiences for our merchants and our partners. And we need your help. So, join us to build tomorrow, today. We believe in equal opportunities. Checkout.com is an equal opportunities employer. We welcome applications from all members of society irrespective of age, sex, disability, sexual orientation, race, religion, or belief. We make recruiting decisions based on your experience, skills and personality. We believe that employing a diverse workforce is the right thing to do and is central to our success.

We’re a forward-thinking tech and analytics company transforming residential real estate. Our mission: to build the world’s most advanced, accessible real estate platform—no distractions, no custom services. Our product outshines industry giants in capability, efficiency, and cost. We’re looking for relentless, resourceful individuals who tackle challenges head-on, achieving what others deem impossible with limited resources, conflicting priorities and seemingly unrealistic timelines often set by external forces beyond our control. This isn’t for comfort seekers, side hustlers, freelancers, job hoppers, or resume builders. Here, full dedication and singular focus is essential—expect discomfort, intensity, unpredictability, and growth. You’re either all-in, or you’re not. For the right person, it’s a chance to unlock your true potential. Our environment builds strength and resilience—and we’ve heard that after a few years with us, many go on to quadruple their compensation elsewhere (we don’t poach from big tech, but they do from us). Think you’ve got what it takes? Then jump on board! What are you waiting for, another moon landing?

A virtual data room (VDR) is a virtual space that acts much like a physical data room except that all data is hosted securely online. In the days before virtual data rooms, M&A potential buyers would need to visit an actual room in person to review stacks of critical documents and paperwork. Today multiple potential buyers can access confidential information simultaneously online. Data rooms make the entire M&A due diligence process easier, more efficient and safer for everyone involved. They allow the sell side party to keep full control over how and when information is revealed and to whom. The sell side can also manage all communication with their bidders through the data room. When the deal is done, they offer a full audit trail of disclosure through a single digital archive of all activity.

Straddle is an early stage startup building the payments infrastructure required to power the next generation of companies and software – all built on modern banking rails. Our unified API abstracts away fragmented systems – from identity to open banking – to enable seamless account-to-account payment experiences at scale. We’re building a future where money moves at the speed of data.